IB or AF: 2 days early

Beebre

I got what I thought/think may be AF early. It was about a medium flow for 2 days and then BOM not a drop more. I didn't have any of my usual PMS symptoms like severe cramps or backaches. Just a constant on and off twinge in my lower abdomen since 3DPO. I've also been having night sweats the last 2 days and major headaches. I did read IB can sometimes be a bit heavier and be misinterpreted for AF. Had anyone had a BFP after their 'period'?